<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<div id="draw">
			根据层次关系查找节点
		</div>
		<script>
			var e=document.getElementById('draw');
			console.dir(e);
		</script>
	</body>
</html>
